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This is a collection of three articles with the common theme of being aggregate products for various applications in LID.
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==Underground construction aggregates==
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===For reservoirs===
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{{:Reservoir aggregate}}
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===For choking/choker layers===
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{{:Choking layer}}
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===OPS Aggregates===
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{{:OPS Aggregates}}
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For more information see [[OPS aggregates]]
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==Reservoir Stone==
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==Landscaping aggregates==
 
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{{:Stone}}
 
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==On-site verification==
 
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{{:Jar test}}
[[File:Particle void ratio.png|thumb|The highest void ratio is found in uniformly graded aggregate, as there are no smaller particles to occupy the inter-particle pores.]]
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[[File:Particle permeability.png|thumb|Higher permeability is found in larger, angular, uniformly graded aggregate. This is due to larger pore sizes and lower tortuosity.]]
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The important characteristics of the stone within the reservoir or [[underdrain]] are the lack of fines, the void ratio and (to a lesser extent) the permeability.
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Porosity and permeability are directly influenced by the size, gradation and angularity of the particles <ref>Judge, Aaron, "Measurement of the Hydraulic Conductivity of Gravels Using a Laboratory Permeameter and Silty Sands Using Field Testing with Observation Wells" (2013). Dissertations. 746. http://scholarworks.umass.edu/open_access_dissertations/746</ref>
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==Stone for erosion control==
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Aggregates used to line [[swales]] or otherwise dissipate energy (e.g. in [[forebays]])should have high angularity to increase the permissible shear stress applied by the flow of water. However, in some surface landscaped applications there may be a desire to use a rounded aggregate such as 'river rock' for aesthetic reasons.
 

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